carcinoembryonicantigen

car·ci·no·em·bry·on·ic antigen (kär'sə-nō-ĕm'brē-ŏnʹĭk) n. Abbr. CEA

A glycoprotein present in fetal gastrointestinal tissue and in the cells or serum of adults having certain types of cancers. It is used clinically to monitor the effectiveness of a treatment, as for colorectal cancer.

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